定义一个球体的一个顶点不允许进入。这允许反向碰撞动画布料。

Definition of a sphere a vertex is not allowed to enter. This allows collision against the animated cloth.

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这对创建人偶十分适用，通常，当你希望一个角色依照动画活动，然后由于爆炸或者其他你选择的情况而引起的碰撞导致其变为人偶。

This is great for creating ragdolls, when you normally want a character to follow an animation, then turn into a ragdoll when a collision occurs, prompted by an explosion or anything else you choose.

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支持动态的阴影，粒子系统，角色动画，室内和室外技术以及碰撞检测等。

Support dynamic shadows, particle systems, character animation, indoor and outdoor technology, and collision detection.

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